1 Land contracts or contracts for deed are a security agreement between a seller, called a Vendor, and a buyer, called a Vendee.  The Vendor agrees to sell a property by financing the purchase for the Vendee.
The two DNA strands are held together by interchain hydrogen bonds. H-bonds pair the bases in one chain to the complementary bases in the other chain. (A/T and G/C).
Clackamas Community College explains that two types of hydrogen bonds exist between DNA strands: adenine bonds with thymine (A-T) and cytosine bonds with guanine (C-G). RNA differs from DNA because RNA uses the uracil molecule instead of thymine (A-U).